メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.045604939828 37.9292231623958, 139.045706015388 37.9295601482503, 139.045505769663 37.9296168288217, 139.044792651611 37.9298404606411, 139.044796366579 37.929868318708, 139.04474374323 37.9298909472902, 139.04450647437 37.9299463886191, 139.044445249148 37.9298078617384, 139.044408739755 37.9297251096361, 139.044180843487 37.9292473660272, 139.044804858013 37.9291188971754, 139.045116688163 37.9290701478924, 139.045524874393 37.9290064495973, 139.045604939828 37.9292231623958)) ^^http://www.opengis.net/ont/geosparql#wktLiteral